INDUSTRIAL LAW – breach of s 16 of the Occupational Health and Safety Act 1991 (Cth) – liability admitted – question of pecuniary penalty to be imposed – assessment must take into account the particular circumstances of the incident – whether principles should be adopted from criminal law sentencing process – penalty should reflect objective seriousness of breach – assessment must also focus on the practical steps that could be taken to protect the health and safety of employees at the workplace – penalty imposed which differs from assessment offered by the parties